Run Infer with Xcode 12.5.1 to fix pull_request action
Run Infer with Xcode 12.5.1 to fix pull_request action

GitHub is rolling out a change to make Xcode 13 the default, and
Infer 1.0.1 (latest) cannot parse the iOS 15 SDK headers :-/

bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa,bugsnag/bugsnag-cocoa